The ANWETECH AT-WET 9L is a mechanically actuated automatic water-based fire suppression system designed primarily for diesel mining vehicles and heavy machinery engine compartments.
It combines automatic heat detection and manual emergency activation, allowing the system to operate independently from the vehicle electrical system. Six SUS304 high-pressure atomizing nozzles distribute the water-based extinguishing agent across designated high-risk areas for rapid cooling and fire suppression.
The AT-WET 9L is designed to protect high-risk areas of diesel-powered mining and industrial vehicles.
The system uses a completely mechanical actuation principle. During normal standby conditions, the extinguishing-agent piping and actuation piping are not continuously pressurized.
When a fire causes the temperature around the mechanical heat detector to reach its rated activation temperature, the detector releases compressed gas to the operating valve. The operating valve then activates the extinguishing cylinder, allowing nitrogen to drive the water-based extinguishing agent through the distribution piping and high-pressure atomizing nozzles.
The system can also be manually activated by the vehicle operator.
The source technical document specifically describes the system as having mechanical triggering without an electrical power supply and both automatic and manual activation functions.
The system uses a temperature-sensitive mechanical fire detector.
Detector temperature options:
141°C / 182°C
When the specified temperature is reached, the mechanical sensing element activates the extinguishing system automatically.
A dedicated manual trigger allows the operator to activate the extinguishing system when a fire is identified before automatic activation.
Maximum operating distance: 10 m
The manual trigger can be installed in different orientations according to the vehicle installation layout.
The fire suppression system uses a mechanical actuation principle, eliminating the need for an external electrical power supply for system triggering.
This makes the system independent from the vehicle electrical system during mechanical fire activation.
During normal standby operation:
Agent piping: no continuous pressure
Detection / actuation piping: no continuous pressure
This is one of the characteristic design features described in the original technical specification.
The AT-WET 9L uses:
Net extinguishing-agent fill:
The nominal system designation is 9 L, while the actual specified net extinguishing-agent filling quantity is 7 L.
For the website, I recommend displaying this as:
This avoids customers misunderstanding that the cylinder contains 9 L of extinguishing agent.
The specified time interval from actuation of the system triggering device to actual extinguishing-agent discharge from the nozzle is:
The effective extinguishing-agent discharge duration is:
The AT-WET 9L is supplied with:
Main specifications:
| Parameter | Specification |
|---|---|
| Number of Nozzles | 6 pcs |
| Nozzle Type | Single-Orifice High-Pressure Atomizing Nozzle |
| Nozzle Reference | 2.0-80° |
| Material | SUS304 |
| Spray Angle | 80° |
| Flow Rate | 4.35 L/min per nozzle using water as test medium |
| Minimum Distance to Protected Target | ≥0.2 m |
| Nozzle Installation Spacing | 300–500 mm |
The source technical section specifies a maximum effective spray distance of 1.0 m.
| Parameter | Specification |
|---|---|
| Brand | ANWETECH |
| Product Model | AT-WET 9L |
| Product Type | Automatic Water-Based Vehicle Fire Suppression System |
| Activation Method | Mechanical Automatic + Manual |
| External Electrical Power for Actuation | Not Required |
| Nominal System Size | 9 L |
| Net Agent Fill | 7 L |
| Extinguishing Agent | S-100-AB-ST Water-Based Extinguishing Agent |
| Cylinder Quantity | 1 |
| Driving Medium | Nitrogen (N₂) |
| Driving Nitrogen Pressure | 2.5 MPa |
| Effective Discharge Time | 16–20 s |
| System Response Time | ≤2 s |
| Number of Nozzles | 6 |
| Nozzle Material | SUS304 |
| Spray Angle | 80° |
| Single-Nozzle Flow | 4.35 L/min |
| Automatic Activation Temperature | 141°C / 182°C |
| Detector Thermal Response | ≤11 s after reaching response temperature |
| Agent Pipe Material | SUS304 |
| Agent Pipe Diameter | 12 mm |
| Actuation Pipe Material | SUS304 |
| Actuation Pipe Diameter | 10.2 mm |
| Nozzle Spacing | 300–500 mm |
| Ambient Temperature | -40°C to +60°C |
| Atmospheric Pressure | 80–110 kPa |
| Standard Altitude | Below 2,000 m |
| Service Life | ≥5 years |
| Rated Protected Volume | ≥1 m³* |
The main source specifications confirm the 7 L net agent quantity, 16–20 s discharge duration, nitrogen driving pressure and protected-volume statement.
The AT-WET 9L can be arranged to protect vehicle fire-risk areas including:
One of the primary protected areas for mining vehicles.
Provides local protection around areas where combustible liquids may be present.
Suitable for high-risk hydraulic-system power-pump areas.
Nozzles can be arranged around vehicle transmission fire-risk zones.
Can be incorporated into the overall vehicle fire-protection layout where required.
Relevant electrical circuitry may also be included in the protection design subject to correct installation and isolation procedures.
These areas are listed in the supplied technical document as intended protection zones.
The product page can use the following application keywords:
Mining Trucks
Diesel Mining Vehicles
Underground Mining Equipment
Excavators
Loaders
Heavy Construction Machinery
Diesel-Powered Mobile Equipment
Engine Compartments
Hydraulic Machinery
For the strongest technical positioning, I recommend the website headline focuses on:
rather than claiming it is a universal system for every vehicle type.
The source technical document specifies an operating environment involving:
Specified environmental conditions include:
Temperature: -40°C to +60°C
Atmospheric Pressure: 80–110 kPa
Altitude: Below 2,000 m
Applications above 2,000 m require a specific engineering review.
For the public website I recommend wording this carefully as “designed for demanding mining environments”, rather than writing ATEX / explosion-proof certified, because the supplied document does not provide an ATEX certificate.
A fire or abnormal heat develops within the protected vehicle machinery area.
The mechanical detector senses the temperature increase.
At 141°C or 182°C, depending on the installed detector, the heat-sensitive element activates.
Compressed gas is released into the actuation piping and transmitted to the operating valve.
The operating valve releases the extinguishing cylinder.
Nitrogen drives the S-100-AB-ST water-based extinguishing agent through the discharge piping.
Six atomizing nozzles distribute the extinguishing agent into the protected area.
The water-based agent provides rapid heat absorption and suppression of the developing fire.
The operating sequence is directly described in the original system working principle.
The AT-WET 9L uses two functional piping circuits.
Material: SUS304
Diameter: 12 mm
Material: SUS304
Diameter: 10.2 mm
Metal hard piping and stainless-steel flexible hose connections are used within the protected area.
This gives us a strong website marketing phrase:
| No. | Component | Quantity |
|---|---|---|
| 1 | Fire Suppression Cylinder Assembly | 1 pc |
| 2 | Cylinder Mounting Bracket | 1 pc |
| 3 | Automatic Heat Detector with Bracket | 1 pc |
| 4 | Manual Trigger with Bracket | 1 pc |
| 5 | Agent Discharge Piping | 1 set |
| 6 | High-Pressure Atomizing Nozzle with Protective Cap | 6 pcs |
| 7 | Agent Hose | 1 pc |
| 8 | Automatic Actuation Hose | 1 pc |
| 9 | Manual Actuation Hose | 1 pc |
| 10 | Installation Pipes, Fittings and Accessories | 1 set |
| 11 | Discharge Pipe Fixing Clamps | 1 set |
The original supply list confirms these eleven main supply items.
The cylinder can be installed:
Horizontally
or
Vertically
For horizontal installation, the pressure gauge should face upward.
The cylinder is secured using a full-circle mounting clamp.
The six nozzles can be positioned around different vehicle risk zones according to the final engineering protection layout.
Recommended nozzle spacing:
Because the system does not rely on vehicle electrical power for mechanical activation, it can continue to provide a dedicated fire-protection function independent of the vehicle electrical control system.
Two activation methods provide both automatic protection and operator intervention capability.
Suitable for vehicle applications where independent fire protection is required.
Specified system response time of ≤2 seconds from triggering to nozzle discharge.
Water-based extinguishing media combines suppression with cooling of heated surfaces.
Multiple atomizing nozzles allow the extinguishing agent to be distributed around the protected machinery zone.
The agent piping, activation piping and nozzle assembly use stainless-steel components in the specified system configuration.
Developed specifically around diesel engine and heavy-equipment fire-risk areas.
